Hi,<div><br></div><div>To maybe try to speed up my resolution, I would like to not compute the values of the preconditionner at every time step, I was wondering if I could do the following:</div><div><span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; font-family: Times; font-size: medium; ">1) At a certain point in time, I ll use <a href="http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/docs/manualpages/KSP/KSPGetPC.html">KSPGetPC</a> to get the preconditionner</span></div>
<div>2) I would then use <span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; font-family: Times; font-size: medium; "><a href="http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/docs/manualpages/KSP/KSPSetPC.html">KSPSetPC</a> to set the values of the preconditionner, assuming this will prevent the calculation of the preconditionner values. Is it a correct assumption or should I use a parameter to enforce not re-calculating the precontionner values ? Note that </span><span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; font-family: Times; font-size: medium; ">I am using a </span><span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; font-family: Times; font-size: medium; ">GMRES solver with a block jacobi preconditionner (superlu).</span></div>
<div><br></div><div>Thank you</div><div><br></div><div>Fabien<br clear="all"><div><br></div>-- <br><div>Fabien Delalondre, PhD.</div><div>Senior Research Associate, Scientific Computation Research Center (SCOREC).</div><div>
Rensselaer Polytechnic Institute (RPI), Troy, NY.</div><div>Email: <a href="mailto:delalf@scorec.rpi.edu" target="_blank">delalf@scorec.rpi.edu</a>, Phone: (518)-276-8045</div><br>
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